Was Achilles justified in his wrath against Agamemnon and his subsequent withdrawal from battle?

Yes, Achilles is justified in his wrath against Agamemnon and his subsequent withdrawal from battle.

Reasons:

Agamemnon is being selfish

Agamemnon cares more about Chyrsies than his army

Achilles does not have to fight in the war, but he is doing it for Agamemnon